Well Yes and No to this one. There is an issue caused by using RDTSC directly on multi-core machines but simply forcing everything to use a single processor isn't a graceful way of handling it. This is generally the fix used for games which were designed for singlecore machines, I've used it to get Battlefield:1942 running for example.

Ah, I just realised that your actually talking about the solution proposed in this following article of generating time deltas in a main thread which is bound to one of the cores.

http://msdn2.microsoft.com/en-us/library/bb173458.aspx

Doh, ignore the first part :)

Andy

Ah, thanks for the link :)
...although the frequency information on that page seems to contradict itself somewhat?