Hello, after all those run these 2 and if there is nothing I would suspect a hard/software issue.
Please Download TDSSkiller
Click on change parameters-Select TDLFS file system
Click on "Scan
Please post the LOG report(log file should be in your C drive)
Do not change the default options on scan results.
Please download aswMBR
( 4.5MB ) to your desktop.
- Double click the aswMBR.exe icon, and click Run.
- When asked if you'd like to "download the latest Avast! virus definitions", click Yes.
- Click the Scan button to start the scan.
- On completion of the scan, click the save log button, save it to your desktop, then copy and paste it in your next reply.