I have a IBM Thinkpad I use for work. I had issues yesterday, that seemed to be memory related. Very slow response, MS Office freezing at opening. Very unusual behaviors for this laptop! Today, I looked at the Control Panel/System, and it shows 3G memory. I checked the BIOS... 4096 memory recognized. I popped both chips, re-seated them. Still 4096 in BIOS, 3G in System. Am running repair for Office, since it appears to be corrupt, now. Any suggestions about the difference in memory registering??\n\nThank you for ANY ideas!!