Mouse that exceeds the screen limit

Hello,
I have a small problem since I restored my system; on the right side of my newly purchased 22-inch Acer screen (before the restoration), the mouse completely exits the screen boundary, and only on the right side, as if virtually the screen were larger. Additionally, now when I turn on Windows Media Player, it goes completely to the right and I can't bring it back into view because I can't even see it; I hear the sound and know the window is way over to the right, but I can't see or retrieve it. Here is my configuration:
Plugin version 2.0.4.12

Operating system: Windows XP Home Edition (build 2600) Service Pack 2
Default web browser: Internet Explorer
Default email client: Outlook Express

Motherboard SMBios version 2.3
ASUSTeK Computer INC. P5VD2-MX SE Rev 1.xx
Bios: American Megatrends Inc. 0401 03/21/2007 size: 512Kb

Processor Intel(R) Pentium(R) 4 CPU 2.93GHz (2933Mhz) (L1: 28kB L2: 1024kB)

Southbridge chipset: VIA VT8237A

Memory 1024 MB Stick Manufacturer0
512 MB Stick Manufacturer1
Windows memory (this value does not exactly match the total
physical memory): 1535MB

IDE devices ST3200822A 3.01 (ATA, 176.04 GB, buffer: 8 MB)

CD/DVD drives TSSTcorpCD/DVDW SH-W162CTS10 (DVD-R/DL sequential recording Recorder)
TR1615Y XXT053Q 1.0 (DVD-ROM)

Hard drive ST3200822A (176.04GB)
Generic USB CF Reader USB Device
Generic USB MS Reader USB Device
Generic USB SD Reader USB Device
Generic USB SM Reader USB Device

PCI/AGP Cards Storage
VIA Technologies, Inc.:VT8237A SATA 2-Port Controller
VIA Technologies, Inc.:VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE

Network
VIA Technologies, Inc.:VT6102 [Rhine-II]

Display
nVidia Corporation:NV44 [GeForce 6200 TurboCache(TM)]: NV44 [GeForce 6200
TurboCache(TM)]

Multimedia
Philips Semiconductors:SAA7133/SAA7135 Video Broadcast Decoder
VIA Technologies, Inc.:VIA High Definition Audio Controller

Bridges
VIA Technologies, Inc.:P4M890 Host Bridge
VIA Technologies, Inc.:P4M890 Host Bridge
VIA Technologies, Inc.:P4M890 Host Bridge
VIA Technologies, Inc.:P4M890 Host Bridge: P4M890 Host Bridge
VIA Technologies, Inc.:P4M890 Host Bridge
VIA Technologies, Inc.:P4M890 Security Device: P4M890 Security Device
VIA Technologies, Inc.:P4M890 Host Bridge: P4M890 Host Bridge
VIA Technologies, Inc.:VT8237 PCI Bridge: VT8237 PCI Bridge
VIA Technologies, Inc.:P4M890 PCI to PCI Bridge Controller: P4M890 PCI to PCI
Bridge Controller
VIA Technologies, Inc.:P4M890 PCI to PCI Bridge Controller: P4M890 PCI to PCI
Bridge Controller
VIA Technologies, Inc.:VT8237A PCI to ISA Bridge
VIA Technologies, Inc.:VT8251 Ultra VLINK Controller
VIA Technologies, Inc.:VT8237A Host Bridge: VT8237A Host Bridge

System
VIA Technologies, Inc.:P4M890 I/O APIC Interrupt Controller: P4M890 I/O APIC
Interrupt Controller

Bus Series
VIA Technologies, Inc.:VT82xxxxx UHCI USB 1.1 Controller
VIA Technologies, Inc.:VT82xxxxx UHCI USB 1.1 Controller
VIA Technologies, Inc.:VT82xxxxx UHCI USB 1.1 Controller
VIA Technologies, Inc.:VT82xxxxx UHCI USB 1.1 Controller
VIA Technologies, Inc.:USB 2.0

USB Devices Alcor Micro Corp. Hi-Speed 21-in-1 Flash Card Reader/Writer (Internal/External)
(Mass Storage Device)
Creative Technology, Ltd Creative WebCam Live! Pro (Creative WebCam Live! Pro)
Logitech, Inc. MX-1000 Cordless Mouse Receiver (USB RECEIVER)

Keyboard PS/2 Keyboard

Mouse Logitech HID-compliant Cordless Mouse

Screen(s) Plug-and-Play Screen (Acer AL2251W)
Plug-and-Play Screen (Acer AL2251W)
Default Screen
Default Screen

Please help me resolve this issue. Thank you

Configuration: Windows XP Internet Explorer 7.0