Out of the two computers I have home, the other has this exact problem and the other does not.
Whenever I select a unit on the computer 1, the the mouse cursor freezes for 1-10 seconds depending on what I select. If I select a vehicle it seems to be more likely a longer time and in case of units, a shorter time. After few clicks the game crashes completely and I need to ctrl-alt-del to desktop.
On computer 2, everything works perfectly for except whenever I press shift key to make unit selection (area selection), the cursor freezes for a while (units keep moving, but the cursor is frozen).
Computer 1 specs:
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AMD Athlon 2400+ 2.0 GHz
ATI Radeon 9600 with latest Ati catalyst drivers
2 Gb memory
Windows Vista 32-bit
Computer 2 specs:
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(HP nw8240 laptop)
Intel Pentium M 2.13 GHz
1G ram
ATI Mobility FireGL V5000 6.14.0010.6677 (8.5.2007) driver
Windows XP Pro SP 2
Luckily I have this second computer on which I'm able to play