I would think Win7 is you problem with the older release of Inventor you
have. Make sure you have all Service Pack's installed for Inventor and you
have updated all your drivers especially your graphics card.
Did you also follow all the installation procedures:
InventorSuite 2010 Suite Pro sp2
Dell Precision 690
Dual Quad Core E5320 @ 1.86GHz
4Gb DDR SDRam - 667 Mhz, ECC
SAS 146Gb - 15k rpm
Quadro FX3500 256Mb - Driver: 191.78 Bios: 126.96.36.199.08
XP Pro Sp3 3Gb/2800
Space Explorer USB, release: 3.8.3 driver 6.8.1 firmware 3.17
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Why is this happening? I have a win. seven.
I would say graphics card driver update is required