Weird Half-Life Bug

[TheDarkHorizon]

Whenever I try to play Half-Life, it runs fine the first time, but if I escape out (alt+tab, try to change controls, pressing escape, etc), I am unable to resume the game. I can hear all the sounds and when i click it shoots. Anyone know what could be the problem?

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AMD Athlon K7 750MHz
256MB PC-100 SDRAM
20GB Maxtor 7200RPM Hard Drive
8.6GB Maxtor 5400RPM Hard Drive
ATAPI 40X max Generic CD-ROM
IDE-CD ReWritable-2x2x6x
SB Live Value
Matrox Millenium G400 32MB
SMC EZ Card 10/100 (SMC1211TX) (Network Card To Cable Modem)
3Com EtherLink III ISA (3C509b-TPO) (Network Card To Network Bridge)
Windows 2000 5.04 Matrox Millenium G400 Drivers
Windows 2000 Advanced Server

[Stil]

Matrox knows about this bug. It's been in the drivers for a while.

[Smiff]

This is another one that needs fixing please Matrox - or can someone tell me how to disable ALT-TAB? That would be just as good