System Information
------------------
Time of this report: 8/11/2009, 21:46:10
Machine name: DUALCORE
Operating System: Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.lh_sp2rtm.090410-1830)
Language: German (Regional Setting: German)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ (2 CPUs), ~2.6GHz
Memory: 1022MB RAM
Page File: 708MB used, 1303MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6001.18000 32bit Unicode

ich denke da kann kein error kommen und ann allen 3 pc´s von mir geht es nicht ma verschwindet die maus ma was anderes

Stell mal HW-Coursor an (Optionen => Grafik/Audio)
Daran könnte es liegen.