New bitlord 2.3.2 is very slow with windows 7 x64.

SOURCE: is it possible to upgrade....

To upgrade your PC from Windows XP to Windows 7, you'll need to select the Custom option during Windows 7 installation. A custom installation doesn't preserve your programs, files, or settings. It's sometimes called a "clean" installation for that reason.
A custom installation is more complex, and it can sometimes take a couple of hours to complete.



What you need

• An external hard disk. You'll need to move your files off of your PC before you install Windows 7. To make this easier, we recommend a free download called Windows Easy Transfer, which will require an external hard disk. They’re readily available at electronics and office supply stores, and they provide an easy way to add additional storage space to your computer.
  
• The original installation discs or setup files for the programs that you want to use with Windows 7. You’ll need to reinstall your programs by hand after installing Windows 7. When you run Windows Easy Transfer you will get a report that lists the programs that you are currently using with Windows XP.
  

32-bit or 64-bit: Which version of Windows 7 to install? Both 32-bit and 64-bit installation discs are included in the Windows 7 package. 64-bit operating systems can handle large amounts of memory—typically 4 gigabytes (GB) of random access memory (RAM) or more—more efficiently than 32-bit operating systems. However, not all computers are 64-bit capable. For more information.
You'll probably need the 32-bit version, but to make sure, click Start, right-click My Computer, and then click Properties.

• If you don’t see "x64 Edition" listed, then you’re running the 32-bit version of Windows XP. Step 1 of this tutorial will show you how to run the Windows 7 Upgrade Advisor, which can let you know if your computer is capable of running the 64-bit version of Windows 7.
  
• If "x64 Edition" is listed under System, you’re running the 64-bit version of Windows XP and can run the 64-bit version of Windows 7.
  

If you want to run Windows 7 on your PC, here's what it takes:

• 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
  
• 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
  
• 16 GB available hard disk space (32-bit) or 20 GB (64-bit)
  
• DirectX 9 graphics device with WDDM 1.0 or higher driver
  

To install windows 7 OS there are steps you can take look at. Please visit this link: http://windows.microsoft.com/en-IN/windows7/help/upgrading-from-windows-xp-to-windows-7