Avast scans on Microsoft Windows Vista issue

Hi,

I have a Windows Vista computer and am attempting to run a full system scan with Avast to detect any threats/viruses. Unfortunately, the past several attempts I’ve tried this has the laptop frozen approximately 20 minutes into the scan, both when I just have Avast up and when I’m searching the Internet while the scan’s in progress. How can I complete a full Avast scan without freezing? I also tried it in regular Safe Mode but to no avail. Any help would be appreciated. Thanks! I’m not 100% certain what version of Vista I have so here are some numbers that can be of assistance:

BRAND: Toshiba

PART NUMBER: PSCOYU-007008

If you require additional info, let me know.

Open avast’s log file and let us know at what file (and the location of the file) avast seems to be hanging.

When going for a full system scan, I suggest you run CCleaner first to remove a lot of culprit.
There is no need to scan temporary files and such.
Lesser file to scan = shorter scan time.
Run a boottime scan, that way avast will run with a minimum of other things running (in the background) and can make better use of your system.
That also shortens scan time.