Use the Add or Remove Programs tool in Control Panel
1. Click Start, click Run, type appwiz.cpl in the Open box, and then click OK.
2. Click to select the Show Updates check box.
3. Click Windows XP Service Pack 2, and then click Remove.
4. Follow the instructions on the screen to remove Windows XP SP2.
Use the hidden $NtServicePackUninstall$ folder
1. Click Start, click Run, type c:\windows\$NtServicePackUninstall$\spuninst\spuninst.exe in the Open box, and then click OK.
2. When the Windows XP Service Pack 2 Removal Wizard starts, click Next.
3. Follow the instructions on the screen to remove Windows XP SP2.
Use the System Restore process
1. Click Start, click Run, type %SystemRoot%\System32\restore\rstrui.exe in the Open box, and then click OK.
2. Click Restore my computer to an earlier time, and then click Next.
3. Click the date that you installed Windows XP SP2, and then click Installed Window XP Service Pack 2 in the Restore Point box.
4. Click Next, and then follow the instructions on the screen to remove Windows XP SP2.