Originally Posted by umeshsharma
after googled i found
re-map the missing
ram from where your bios hole is located
Having 1/4GB visible of 4GB total is not one of the usual symptoms, so when google or other search finds similar problems (full ram not shown) they aren't actually similar.
Your problem is something else.
Originally Posted by rayfordj
Turn off OS Install Mode in the BIOS. This option limits the amount of physical RAM presented to the OS. IIRC, it was really only ever useful for installing Windows NT so you could apply SP and then access more RAM.
Very impressive (assuming it is the right answer).
I know a lot of causes and corrections for missing memory. I hadn't heard of that one before.
After you've fixed whatever problem limits you to 0.25GB, you'll probably be up to about 3.25GB. Then you might want to diagnose and fix one of the more common problems in order to get up to around 3.99GB
BTW, the "GB" I'm using above is what is commonly used for ram, 1024 times 1048576 bytes. Not what is commonly used for disk, 1000 times 1000000 bytes. Some people call the larger one GiB, but that isn't common enough to be less confusing.