I have a Dell Inspiron 9400 (E1705) purchased in 2006 (Windows XP Pro version 2002 with Service Pack 3). I bought it with a 120gb hard drive. However, "My Computer" says it's a 106gb hard drive.

A programmer friend of mine took a really quick look and saw that my hard drive was divided up into 3 "partitions;" a 47mb FAT segment called "Healthy (EISA Configuration)", a 106.21gb NFTS segment called "Healthy (system)" and a 4.12gb FAT32 segment called "Healthy (unknown partition)."

He wasn't sure what the 4.12gb partition was, but noted that about 3.5gb of it is in use. That seems like a bad thing ...?

That aside, all totaled that is still only around 110gb of memory. What happened to the other 10gb? Any thoughts?

NOTES:
- He did pull the hard drive and verified that it was labeled 120gb.
- I did have a virus in January of 08 which GeeksToGo helped fix. However, I don't have any recollection of when the 10gb went missing.
- According to my Trend Micro and SUPERAntiSpyware my computer seems to be clear of viruses.
- My MS updates appear to be current except for the "Genuine Advantage" update
- One noticeable problem I have with my PC is there are a few websites I cannot access on a consistent basis; most notably DPReview.com. I can access them occasionally, but more so than not they just bomb. I have not had a problem accessing Norton or Trend Micro.

One last note: I am not a computer guy.