Here is a little program which'll reveal your processor and memory configuration:
CPU-Z.
A 733mhz sounds like a 10 year old P3 or Celeron (same, but half the cache).
Well more than adequate for the tasks at hand.
The only real concern, is that the electrolytic capacitors on the motherboard haven't dried out or leaked, since 733's are pretty old.
And maybe that the power supply is still working. (but that could be a $5 fix)
Some years ago, I got a throw-away micro-tower from my lawyer, after it died and he got a new one.
Was a Celeron 433mhz I believe.
After reinstalling Windows, it ran fine.
I used it several years for its two serial ports, then gave it to a buddy who shipped it to his Dad.
That little toad is still running, last I heard.
Dad has an email & web-browsing machine, and we saved the computer from the recycle pile!
I still keep around a very old Toshiba laptop for its serial port.
And it's only a 100 mhz Pentium 1 ! -
- with somewhere around 48 mb of ram.
Anything that'll run Windows 2000 is fine (I try to stay away of Windows 98se, but it does use less ram!)