I've had my Sony Vaio laptop for 2 years: Windows 7 Home Premium w/SP1. 64 bit. Intel Core i5.
Recently I discovered that my System Restore points are disappearing.
They create with no problem.
And I tested a restore and it restored me with no problem.
But daily I will check System Restore and I have the Red X telling me that I have no SR points.
About 8 different anti-virus/rootkit/boot time scans, and they've turned up nothing.
Did scannow and ckdsk with fix/repairs and they've turned up nothing.
Turned off Sys.Restore, rebooted, turned back on, rebooted, no change.
Deleted all SR points, completed new ones, no problem.
I ran Windows diagnostic on my Memory and Hard Drive, no problems.
So I kept checking SR after everytime I'd do something or use a program.
It now appears that when I am running a lot of streaming videos at the same time my Memory goes up to as high as about 91%, and sometimes (fairly often) Adobe Flashplayer crashes.
But even if it doesn't, it is then that I lose my SR points.
I just uninstalled/rebooted/reinstalled Adobe Flash for IE and Firefox.
I've been planning to double my memory anyway from 4 GB to 8GB.
Hopefully that will solve the problem.
But I've had the computer for almost 2 years, and this is a new problem, and I've always streamed a lot of video simultaneously (not all the time but once in awhile) and had Adobe Flash crashes.
But never affecting the SR's.
So I'm not sure if the Memory upgrade will do it, as it's a new problem.
Trying to avoid reformatting Windows to a Sony factory restore.