it really depends on how much RAM memory you have.
not really its the Cashe memory where vista or xp goes some laptops cannot store vista because vista is such a large file, RAM is random acsess memory witch it like a big chalkboard that you computer thinks on, the more RAM you have the faster your computer will be, i have 8 gigs of RAM . the Casche memory is on the motherboard or on some the motherboards you just store it on the hard drive. i run vista, if you have a really good cpu (central prossesing unit) vista is great! sorry if this dosent make any sense. Vista is a VERY sable system (if you have a good computer)my computer buildvideo card EVGA GTX260motherboard EVGA FTWRAM CORSAIR DDR2 X2 8 GIGSCPU INTEL CORE2 QWAD CPU COOLER> COOLER MASTER V8SYSTEM UNIT Windows Vista