What is tdsmapi?

Tdsmapi.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if tdsmapi.sys is a Windows system file or if it belongs to an application that you can trust.

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Tdsmapi.sys file information

The process known as TDSMAPI belongs to software TDSMAPI by unknown.

Description: Tdsmapi.sys is not essential for the Windows OS and causes relatively few problems. Tdsmapi.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 9,343 bytes (77% of all occurrences), 9,340 bytes, 8,830 bytes, 9,341 bytes or 8,831 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The software has no file description. The program is not visible. There is no detailed description of this service. Tdsmapi.sys is not a Windows system file. tdsmapi.sys appears to be a compressed file. Therefore the technical security rating is 54% dangerous; however you should also read the user reviews.

Recommended: Identify tdsmapi.sys related errors

Important: Some malware disguises itself as tdsmapi.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the tdsmapi.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

ThinkPad Configuration Utility
  Major Mitchell Gant   (further information)
TDSMAPI.SYS is related to ThinkPad Configuration Utility. Manufacturer: Lenovo
  rozsagab   (further information)

Summary: Average user rating of tdsmapi.sys: based on 2 votes with 2 user comments. 2 users think tdsmapi.sys is essential for Windows or an installed application.

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Best practices for resolving tdsmapi issues

A clean and tidy computer is the key requirement for avoiding problems with tdsmapi. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the tdsmapi.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

tdsmapi.sys [all]