Microsoft Office 2010 was delivered to June 15, 2010 and after about one year Microsoft got the Service pack 1 for Office 2010 suite which was released on June 28, 2011. Microsoft Office 2010 SP 1 comes with cumulative fixes and many unreleased fixes to stability, performance, and in security. Those who haven’t install Office 2010 Service pack 1 may use this link to download and install.
If you are one of those facing issues after install office 2010 Sp1 and want to just uninstall sp1then here is official tool from Microsoft, Office 2010 SP Uninstall Tool. Although the tool is pre-bundled with Office 2010 Service Pack 1 but making standalone uninstaller utility available for download can be really helpful for those who want easy procedure for Service Pack 1 removal.
Once you download Office 2010 SP Uninstall Tool you can simply extract file content and run OARPMan.exe utility. You may refer to This technet article for supported command list and how to use OARPMan utility to uninstall and remove Office 2010 Service Pack 1.