Could it be registry errors, by any chance?
Very unlikely.
Download
Malwarebytes Anti-Malware and save it to your desktop.
* Double-click mbam-setup.exe and follow the prompts to install the program.
* Be sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select Perform Quick Scan, then click Scan.
* When the scan is complete, click OK, then Show Results to view the results.
* Be sure that everything is checked, and click Remove Selected.
* When completed, a log will open in Notepad. Save it to a convenient location like the Desktop.
* The log is also automatically saved and can be viewed later by clicking the Logs tab in MBAM.
* Copy and Paste the contents of the report in your reply.
* Exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you will be presented with 1 of 2 prompts. Click OK to either and let MBAM proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot will prevent MBAM from removing all the malware.
