Welcome to the PC Pitstop Process Library. We have an extensive list of the most common processes currently running on PCs. Use this library to inspect the safety of your running processes on a regular basis.

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Search For Processes

Process Name

  

Unknown Unknown
Safe Safe
User Optional User Optional
Unwanted Unwanted
Spyware / Adware Spyware / Adware
Virus Virus


calcheck.exe (Ulead Calendar)

Percentage of recently scanned PC's with this process running: 0.04%
Average CPU use for this program: 0%
Average RAM for this program: 2 MB


In addition to the file name, calcheck.exe, the following version information is used to identify the file. If the file does not match this information, it may be a different file. To ensure the file is absolutely correct, run a free and comprehensive scan.

Vendor contains:Ulead
Product is not specified
File name contains:Photo

To view version information with Windows Explorer, right-click the file and click Properties, Version.




Win Patrol

CalCheck.exe - Calendar reminder application for several Ulead products. If you do not use their calendar features you can disable this program through MSConfig.

calcheck.exe  is a user invoked program and a normal part of PC operations. No action required.

PC Pitstop recommends WinPatrol Plus for monitoring all of the background activity on your PC. WinPatrol Plus provides an easy to understand descriptions of over 15,000 processes and programs.


MD5 hashes is the way that computers can define the uniqueness of a file. Anti malware vendors frequently use this technique to detect and clean malware. It is common for a program to have multiple MD5 hashes as the developers create newer versions of the program. For the program called calcheck.exe, we have detected more than 10 different MD5 hashes. Click on a hash to research the hash in Google.

Program Name MD5 Count
calcheck.exe> 10
MD5 Hashes
# MD5 Size
1 0xaa2be1f0cdf1fbced2249b38a6589f18 60 KB
2 0x43e5ea4dd3d9ac1db0585445b7f62f6a 68 KB
3 0x4183540ecdd612f962846ae7778152cd 68 KB
4 0x78a1d5697d67d4663977a732fb9460b2 54 KB
5 0x487781391043ca15d038061aa0a9fb52 68 KB
MD5 Hashes
# MD5 Size
6 0x50a7d80cefcf98280ca6270273db72f5 61440 bytes
7 0x70b59cf8033d6135923d4384828169f9 51712 bytes
8 0x5feec125a984aa06d42769490510177e 55296 bytes
9 0x8e18463950275abb7185e022b6971d22 61440 bytes
10 0xc78a7189839da35fc78fed6de162983c 69632 bytes


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PC Pitstop is the undisputed leader in PC diagnostics. Our running process library is culled from our database of over 100 million PC diagnostics and scans.

To find the latest driver for your computer we recommend running our Free Driver Scan.

Find out how to make your computer faster by running our Free Performance Scan.

Tips from the PitCrew

Tips from the Pit Crew

Every process running on your computer takes up CPU cycles and valuable memory. For optimal PC performance and resource utilization, you should be aware of every process on your computer. PC Pitstop designed this process library to help you know which processes are worthwhile and others that slow system performance.

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Important Note

A file name alone may not be enough for positive identification. PC Pitstop's Overdrive tests and spyware scan use information such as the company name, product name, or install directory.

If you are unable to identify a file, ask about it in our forums after running our full tests.