Do you mean that on the right half of your monitor, the cursor disappears and won't return when you mouse back over to the left side of the monitor? Or if you mouse it off-screen to the right, it won't return?
Also, please fill out your System Specs so we can better assist you.
OS Windows 7 Pro x64 SP1 CPU AMD Phenom II x6 1090T Black Edition 3.2GHz Motherboard ASUS M4A88TD-V EVO/USB3 Memory Patriot G ‘Sector 5’ Edition 8GB (2 x 4GB) 1600MHz Sound Card (onboard) Realtek® ALC 892 8-Channel High Definition Audio Monitor(s) Displays ViewSonic VX2253 22", Dell circa-2002 CRT Screen Resolution 1920x1080, 1024x768
Keyboard Verbatim 97472 Mini Wireless Slim Mouse bundled Verbatim 97472 Wireless PSU CORSAIR TX Series 950W ATX12V 80 Plus Bronze Case Cooler Master HAF X NVidia Edition; 5 Green LED Fans! Cooling CORSAIR A70 120mm Dual-Fan Hard Drives Transcend SSD720 2.5" SATAIII 64GB SSD; Western Digital Caviar Green WD20EARS 2TB 64MB 3.5" HDD
LG WH10LS30 10X Blu-ray Burner with LightScribe Other Info Ultraportable/Desktop Replacement Laptop:
circa Oct 2006,
Dell XPS M1210,
Windows 7 Professional 32-bit,
Intel Core 2 Duo T7200 2.0GHz,
3.25 (4) GB of RAM,
NVidia GeForce Go 7400,
500GB Seagate Momentus 7200RPM HDD -- IT'S ALIVE AGAIN!