You should never turn off your AV, for your machine is unsecure then!!!
![Roll Eyes ::)](https://forum.avast.com/Smileys/default/rolleyes.gif)
HDW
I also does not agree with this
![Sad :(](https://forum.avast.com/Smileys/default/sad.gif)
Consider the following (similar, but not identical to the author's thread) scenario (where avast had to be completely uninstalled in order to provide basic maintenance to the computer?!)
A computer (Win7 32bit with up-to-date Avast running Ok, no viruses) was slow.
Hard Disk Sentinel reported vast amount of bat clusters on the hard drive.
The solution: run a ChkDsk utility on that drive.
However, when ever I attempted to schedule ChkDsk after the system restarted - ChkDsk failed to run with the exit message: this disk is locked due to unknown utility?!?
Mbam was then run on that system and Mbam found NOTHING.
After 3 whole days I figured it out:
(Accepted solution)
- Unnistall Avast from that computer. Completly!
- Run ChkDsk (ChkDsk worked then OK!)
- All bad clusters were mapped.
- Install Avast from scratch and let it update.
(Worked OK)
Why Avast on that computer was locking the drive and preventing the ChkDsk to run - newer actually figured out.
Supposed answer: Avast files itself were maybe damaged due to the bad clusters on that drive.
In that (possible?) case - Avast overlapped with ChkDsk or something, preventing tha ChkDsk to run.