SpeedBit Video Accelerator Removal: Fix DAP and SBLSP.dll

SpeedBit Video Accelerator and Download Accelerator Plus (DAP) are not Windows components. If they appear unexpectedly or an antivirus flags their old files, remove the parent SpeedBit programs first, stop only services that point to the SpeedBit folder, reboot, and then check the remaining files. Do not start by deleting SBLSP.dll: older SpeedBit builds could register it in the Windows Winsock network stack, so deleting the DLL before removing the registration can break internet access.

The same cleanup can involve VideoAccelerator.exe, VideoAcceleratorEngine.exe, VideoAcceleratorService.exe, Download Accelerator Plus components, browser helpers, and legacy network DLLs. A full scan is useful when these files arrived through a bundle, return after reboot, or appear beside other unwanted apps.

What Are SpeedBit Video Accelerator and DAP?

SpeedBit Video Accelerator was an older Windows utility intended to improve video streaming. Download Accelerator Plus, usually shortened to DAP, is a download manager from the same publisher. These were real commercial products, and a valid Speed-Bit digital signature can identify the publisher of a particular file. A signature, however, does not prove that an old installer is appropriate for a modern PC or that every component in the install bundle is wanted.

The useful question is not simply “Is SpeedBit a virus?” Check how it arrived, where its files are stored, whether you intentionally installed it, and what else appeared at the same time. Old SpeedBit installations have included services, browser integration, download hooks, update modules, and Winsock Layered Service Provider (LSP) components. Some installers or components may therefore be classified as adware or potentially unwanted software even though the main executable names belong to a known product.

Gridinsoft ThreatInfo, for example, records one signed Download Accelerator Plus 8.6 sample as Adware.SBWatchman. That verdict applies to the recorded sample and hash, not automatically to every file ever published under the DAP name.

SpeedBit Files You May Find

Use filenames as clues, then confirm them with the folder path, publisher, installed-program entry, and creation date. A random file that only copies a familiar name should not be trusted.

A cluster of several matching files under C:\Program Files (x86)\SpeedBit\, C:\Program Files (x86)\SpeedBit Video Accelerator\, or a DAP folder supports the legacy-product explanation. The same names in Temp, a random AppData subfolder, or an unrelated program directory need closer inspection.

Why Antivirus Finds Old SpeedBit Files Years Later

An old program can remain quiet until a signature update, full scan, Windows migration, backup restore, or disk cleanup exposes it. The current alert may point to an inactive installer, an uninstall archive, or a service that still starts with Windows. It does not necessarily mean the PC was infected that day.

At the same time, “old leftover” should not become an excuse to ignore the alert. Check for these signs:

• SpeedBit or DAP is still listed in Installed apps even though you no longer use it.
• VideoAcceleratorService.exe runs after every reboot.
• The browser opens an unfamiliar search page, toolbar, or download helper.
• A SpeedBit folder returns after you delete it.
• Several unwanted programs share the same installation date.
• The detected file is in Temp, Downloads, a browser cache, or an unexpected AppData path.

If the main symptom is advertising, redirects, or a changed homepage, use the broader adware symptom checklist as well. SpeedBit cleanup should not stop at one executable when the same installer added browser or startup components.

How to Remove SpeedBit Video Accelerator and DAP

1. Record the file path before removing anything

Open the antivirus detection details or file Properties and save the full path. In Task Manager, right-click a running SpeedBit process and choose Open file location. Check the Digital Signatures tab when it exists. This separates a known legacy folder from a malware copy using a similar filename.

2. Uninstall the parent programs

Open Settings → Apps → Installed apps. Search for SpeedBit Video Accelerator, Download Accelerator Plus, DAP, and SpeedBit Video Downloader. Remove the parent applications before deleting their folders. Also review programs installed on the same date, but do not remove software only because it is unfamiliar.

If the entry is missing, the uninstaller reports a missing INSTALL.LOG, or Windows says the program cannot be removed, use Microsoft’s Program Install and Uninstall troubleshooting path.^{1, 2} Do not download a replacement uninstaller or DLL from an unknown file site. If you are considering a cleanup utility, first read the safe leftover and registry-cleanup guide so you can review every proposed deletion.

3. Stop only confirmed SpeedBit services

Press Win+R, enter services.msc, and look for a Video Accelerator or SpeedBit service. Open its Properties and verify the executable path. Stop and disable it only when the path clearly belongs to the program you are removing. A vague service name without a matching SpeedBit path is not enough evidence.

Then check Task Manager → Startup apps for SpeedBit, DAP, Video Accelerator, or a same-path updater. The startup-app verification guide explains how to distinguish a real publisher entry from a wrong-path copy.

4. Reboot, then remove confirmed folders

Restart Windows so the service, browser helper, and updater are no longer holding files open. Remove only the remaining SpeedBit or DAP folder whose path you recorded. Do not delete the parent Program Files, ProgramData, AppData, or browser profile folder.

5. Handle SBLSP.dll without breaking the network

SBLSP.dll is the dangerous manual-cleanup point. Older SpeedBit software could register this DLL as a Winsock LSP. If you delete it while the catalog still expects to load it, browsers and other programs may lose network access.

Open Terminal or Command Prompt as administrator and inspect the catalog with netsh winsock show catalog. If SpeedBit has already been uninstalled but internet access broke after its LSP file was removed, run netsh winsock reset, restart the PC, and test the connection again. A Winsock reset removes custom LSP registrations, so VPN, web-filtering, or other networking software may need repair or reinstallation afterward.³

If DNS still fails after the reset, follow the DNS recovery checks after unwanted software. Do not download SBLSP.dll from a DLL repository to make the error disappear.

6. Clean browser integration

Open the extension page in every browser you use and remove only SpeedBit/DAP helpers or same-day extensions you did not choose. Check the default search engine, startup page, notification permissions, and proxy settings. If search or homepage changes return, use the browser hijacker removal flow.

7. Scan, reboot, and scan again

A visible uninstall can leave a service, startup entry, browser helper, scheduled task, or another app from the same bundle. Run a full Gridinsoft Anti-Malware scan, remove confirmed detections, reboot, and scan again if files or alerts return. The goal is to confirm that the parent program and its persistence are gone, not to promise that one deleted filename proves the PC is clean.

What Not to Do

• Do not delete SBLSP.dll first and hope Windows repairs the network automatically.
• Do not download replacement DLLs, uninstallers, or “updated” SpeedBit installers from random download sites.
• Do not remove every registry result containing “SpeedBit” without a backup and a matching path.
• Do not assume a valid signature makes an old bundled installer harmless.
• Do not treat every update.exe or uninstall.exe as SpeedBit; verify its folder and signer.

FAQ

References

1. Microsoft. “Uninstall or remove apps and programs in Windows.” Microsoft Support, accessed July 28, 2026. support.microsoft.com.
2. Microsoft. “Fix problems that block programs from being installed or removed.” Microsoft Support, accessed July 28, 2026. support.microsoft.com.
3. Microsoft. “netsh winsock.” Microsoft Learn, updated August 12, 2025. learn.microsoft.com.