If use low sensitivity and moving mouse really slow, ur cursor not movin to left side, but moving to right side. (it is checking with 2 different mice)

And if u try to check for acceleration u could see some uncorrect moving (move mouse to left fast, and back slow to same position, ur cursor will move further to right then before)

Processor Information:
    Vendor:  GenuineIntel
    Speed: 2997 Mhz
    4 logical processors
    4 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Unsupported
    SSE41:  Unsupported
    SSE42:  Unsupported

Network Information:
    Network Speed:  

Operating System Version:
    Windows 7 (64 bit)
    NTFS:  Supported
    Crypto Provider Codes:  Supported 311 0x0 0x0 0x0

Video Card:
    Driver:  NVIDIA GeForce GTS 250

    DirectX Driver Name:  nvd3dum.dll
    Driver Version:  9.18.13.1090
    DirectX Driver Version:  9.18.13.1090
    Driver Date: 29 Dec 2012
    Desktop Color Depth: 32 bits per pixel
    Monitor Refresh Rate: 119 Hz
    DirectX Card: NVIDIA GeForce GTS 250
    VendorID:  0x10de
    DeviceID:  0x615
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    No SLI or Crossfire Detected
    Primary Display Resolution:  1680 x 1050
    Desktop Resolution: 1680 x 1050
    Primary Display Size: 23.35" x 14.57"  (27.48" diag)
                                            59.3cm x 37.0cm  (69.8cm diag)
    Primary Bus: PCI Express 16x
    Primary VRAM: 512 MB
    Supported MSAA Modes:  2x 4x 8x 

Sound card:
    Audio device: ???????? (Realtek High Definiti

Memory:
    RAM:  2047 Mb

Miscellaneous:
    UI Language:  English
    Microphone:  Not set
    Media Type:  DVD
    Total Hard Disk Space Available:  953766 Mb
    Largest Free Hard Disk Block:  33887 Mb
    OS Install Date: ??? 01 1970
    Game Controller: None detected

Installed software:
    µTorrent
    Данные 2ГИС г.Пермь 01.02.2013
    Панель управления NVIDIA 310.90
    Языковой пакет клиентского профиля Microsoft.NET Framework 4 - RUS
    2ГИС 3.12.0.2
    7-Zip 9.20 (x64 edition)
    Adobe Flash Player 11 ActiveX
    Adobe Flash Player 11 Plugin
    AIMP3
    CCleaner
    CheckList2.19
    Counter-Strike
    DAEMON Tools Lite
    FLAC 1.2.1b (remove only)
    HLSW v1.4.0.2
    iZotope RX 2
    K-Lite Mega Codec Pack 9.7.0
    Kaspersky Internet Security 2013
    Microsoft .NET Framework 4 Client Profile
    Microsoft .NET Framework 4 Client Profile RUS Language Pack
    Microsoft Office - профессиональный выпуск версии 2003
    Microsoft Visual C++ 2005 Redistributable
    Microsoft Visual C++ 2008 Redistributable - x64 9.0.30729.17
    Microsoft Visual C++ 2008 Redistributable - x64 9.0.30729.6161
    Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.17
    Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.6161
    MKVToolNix 6.0.0
    Notepad++
    NVIDIA Графический драйвер 310.90
    NVIDIA Системное программное обеспечение PhysX 9.12.1031
    NVIDIA Install Application
    NVIDIA PhysX
    Opera 12.14
    Realtek High Definition Audio Driver
    Security Update for Microsoft .NET Framework 4 Client Profile (KB2604121)
    Security Update for Microsoft .NET Framework 4 Client Profile (KB2656351)
    Security Update for Microsoft .NET Framework 4 Client Profile (KB2729449)
    Security Update for Microsoft .NET Framework 4 Client Profile (KB2737019)
    Security Update for Microsoft .NET Framework 4 Client Profile (KB2742595)
    Speccy
    STDU Viewer version 1.6.191.0
    Steam
    System Requirements Lab for Intel
    TeamSpeak 3 Client
    TeamViewer 8
    Unreal Tournament: Game of the Year Edition
    Update for Microsoft .NET Framework 4 Client Profile (KB2468871)
    Update for Microsoft .NET Framework 4 Client Profile (KB2533523)
    Update for Microsoft .NET Framework 4 Client Profile (KB2600217)
    Virtual MIDI Piano Keyboard
    Windows 7 USB/DVD Download Tool
    XChat 2 (remove only)