From www.auditmypc.com:
"The library file ole2.dll, is required by windows and is used when performing OLE (Object Linking and Embedding) operations . OLE allows objects created in one application to be embedded in documents/objects created by a different applications e.g. embedding an Excel spreadsheet inside a Word document. OLE is used fairly extensively in windows applications, so if possible you should not remove this file. ole32.dll is flagged as a system process and does not appear to be a security risk. However, removing Microsoft OLE Library may adversly impact your system. The Process Server database currently registers ole32.dll to Microsoft. This is part of Microsoft Windows."