hard drive

40 GB without any partitions and other OS is adequate and 80 GB is recommended ...

it depends on the programs you install. I think for Operating System, Microsoft Office, Internet Messengers, small programs, 40 GB hard disk is enough.

Well, it depends on your requirement. if you are not planning on installing any other softwares except windows Xp and also not planning on downloading, etc, about 2-3GB wouldbe enough... This is the minimum to run Windows XP... However, the performance of Windows XP depends almost entirly on your processor power... I believe MS recommends atleast 2GHz... About RAM I would say based on my experience to get atleast 256MB... the configuration that I run here at my PC is: P4 2.4GHz 512 + 256 MB DDR RAM kits 80 + 20 GB UltraDMA2 IDE Harddisks

only 5GB of free space required in c drive

around 1GB just to have windows xp and at leat 256mb ram,i have already try with 128mb on my old pc but it's to much laggy

min 3.5GB

I think if dont put any extra data so you need about 2 GB to run it smoothly...you must have at least 128 RAM too

i don't think it depends on hard drive space, but something else such as ram or processor

5 gb

Yes... 15 to 20 GB free disk space on XP drive must gives you relaxation and also gives you time for not to format again and again....

unless your HD is really stacked up with stuff you should have no problems. I've had my HD down to less that 1GB and everything still runs OK, Albeit a little slow, so I usually try and clean stuff off and put it onto an external HD

I'm sorry I can't help you.

2 GD of free space in which the OS is installed