Laptop VAIO PCG-5122M.
Windows 7 up to date.
Disk C: 138GB free space
At times the computer freezes. The mouse cursor does not move.
Touching any key on the keyboard (including START) has no effect.
The duration of an interruption varies from 1 sec to a few minutes. After a while everything goes back to normal for 1-2 hrs or so.
The user of this laptop uses only Chrome (last update) and Outlook 2010.
Thanks for your help,