Changing OS Windows 7 or Windows XP?

I would like to know which is better for my system, either a downgrade or an upgrade. i've looked up on google on specifications, of size of RAM etc. for each os, but i don't know what will be best for me. just need someone who knows what they are talking about, or has experienced both and knows which will be better for my case. thanks
- current Os- Windows Vista home premium sp2
-HP G5000 genuine intel(R) CPU T2080 1.73GHZ 1.73GHZ
-RAM 1.00GB 32bit os
 
It all depends on which system you are more comfortable with, and what drivers are available for Windows 7 and Windows XP.
That HP works better with XP, methinks, especially with that limited memory you list. Windows 7 needs 4 GB, not 1 GB. Vista isn't worth the time
Tell us how it will be used.
 
^^^ +1

Windows XP for your system, less demand on your video capabilities and system memory.

Windows 7 32-bit calls for at least 2GB
Windows 7 64-bit calls for at least 4GB
 
XP with 1 GB of RAM. Although I'd disagree on needing 4 for Windows 7 (32 or 64). I ran 7 64bit with 3 gigs just fine for years.
 
And I've ran 7 64 with 2gb for a while, it runs fine.

However, there will obviously be some bottlenecks there.
 
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