Because there are some windows programs that are not able to run in Windows7 sp1 x64. Now you have 2 choices:
1. wait for a 64 bit version of that program, that will run under the 64 bit version.
or
2. Install Windows7 sp1 x86 version, now all those older program will run.
I downgraded my windows7 sp1 x64 to windows7 sp1 x86 bootcamp
Unfortunately this process is not painless. You wont be able to save your installed programs during this conversion process. However the reverse upgrading from windows7 sp1 x86 to windows7 sp1 x64 is supposed to work.
The upgrade process or downgrade progress will always keep a copy of the original install in a folder called Windows.old. This Folder can be deleted, once you are happy with your new changes.
The procedure:
1. Press C during booting, and pick the Windows HDD
2. Insert the Windows7 sp1 x86 DVD
3. Run setup from the DVD
4. Choose Install new version (choosing upgrade wont work)
5. After the 2nd reboot, remove the DVD
6. Press C during booting, and pick the Windows HDD, finish installing.
7. Reinstall your windows programs
8. Delete the Windows.old folder
Cheers! I hope someone will find the above useful.
1. wait for a 64 bit version of that program, that will run under the 64 bit version.
or
2. Install Windows7 sp1 x86 version, now all those older program will run.
I downgraded my windows7 sp1 x64 to windows7 sp1 x86 bootcamp
Unfortunately this process is not painless. You wont be able to save your installed programs during this conversion process. However the reverse upgrading from windows7 sp1 x86 to windows7 sp1 x64 is supposed to work.
The upgrade process or downgrade progress will always keep a copy of the original install in a folder called Windows.old. This Folder can be deleted, once you are happy with your new changes.
The procedure:
1. Press C during booting, and pick the Windows HDD
2. Insert the Windows7 sp1 x86 DVD
3. Run setup from the DVD
4. Choose Install new version (choosing upgrade wont work)
5. After the 2nd reboot, remove the DVD
6. Press C during booting, and pick the Windows HDD, finish installing.
7. Reinstall your windows programs
8. Delete the Windows.old folder
Cheers! I hope someone will find the above useful.