sidebar.exe is a application which is probably NOT a virus. So, if sidebar.exe is on your computer, it is probably ok, and will NOT be a cause for concern. Even if your PC is clean, it is still recommended to purchase a well-known antivirus with a good detection rate, in order to defend yourself against viruses and malware.
Usually, this program is located in C:\Program Files\Windows Sidebar\sidebar.exe.
The MD5 checksum for this executable is 7a01b55ee6ddd720cb7ce4048fbf4b3d.
This program is NOT registered as a Windows service. This is good.
This application runs in 32-bit mode. It can not use the entire power of nowadays' PC chips. This ordinarily happens because the publishers did not bother to upgrade it to use the x64 instruction set.
The description stored in the exe is Windows Desktop Gadgets.
File version extracted from the file 6.2.9200.16384 (win8_rtm.120725-1247).
Company Microsoft Corporation.
Intellectual property rights notice © Microsoft Corporation. All rights reserved..
sidebar.exe appears to have a visible user interface. This is good because it doesn't run in some kind of invisible mode. Its activity is clearly displayed to you.
The digital certificate is missing from this program. The maker did not sign it. This is usually bad.
This program starts at your PC's startup. Yes
This application does NOT have a removal routine stored in registry.