Hi W2K
It's a Toshiba Satellite Pro M70 ramped to to 1Gb RAM. Single core Pentium 1.73GHz. Windows 7 runs fine. Only issue I've had is with the indexer. I am using search on a backup PC with the same PSTs and in fact, the search time performance is extremely good. Will find any email in less than 30 seconds.
I'll leave it for even longer to see if it finishes indexing and the CPU ramps down. Already left it overnight twice!
Thanks all for the responses.