You must be very frustrated when your desktop turns into a blue screen telling you it is a problem of tcpip.sys error. If you, like many computer users, never heard of this files before, here are some useful information you don’t want to miss.
What is tcpip.sys?
Tcpip.sys, with a default value of 10, is a limiting file for TCP (Transmission Control Protocol) concurrence linking number used by Microsoft since Windows XP SP2. In order to get a higher download speed on P2P (peer to peer, such as BT download) softwares sometimes, it is allowed to artificially modify or replace the file to break the limit for TCP concurrence linking number of the system.
However, over modification (e.g. modify the value to 100) will lead to a consequence that webpage browsing and QQ login are disabled during the use of P2P software. Microsoft set digital signature for tcpip.sys on Windows 7/Vista, which means the system will be locked down after the modification.
The tcpip.sys loaded in memory can be cracked by TCP-Z on Windows 7/Vista, and the modification will be undone after rebooting the computer. Default of the file on Windows 7 does not limit the concurrence linking number.
Common Reasons of tcpip.sys Error
Generally, the problem occurs due to defective registry entry, driver (e.g. Driver of Logitech MouseWare 9.10 and 9.24 version), memory, virtual memory file, some program (such as multimedia software, antivirus program, backup software, and DVD player software) etc.
A Manual Way to Fix tcpip.sys Error
Copy the tcpip.sys file from C:\WINDOWS\system32\drivers\ on another normal computer with the same operating system as yours, replace the original one (C:\WINDOWS\system32\drivers\tcpip.sys) with it, and restart your computer.
You’re suggested to back up the tcpip.sys before you try to modify the limit of TCP/IP linking number, in case the modification fails or you computer is shut down due to corrupted tcpip.sys file. If you are trying to replace the file in this way, remember to delete the original one first, or your computer system will find out the system file is being removed or replaced, and the dllcache will immediately do the supplement.
Other Relevant Solutions to Deal With tcpip.sys Error
- Check the driver or program you installed or updated recently (it is likely caused by them if “acpi.sys” or similar file names is showed on the blue screen), uninstall or change the defective ones, especially antivirus programs.
- Check the memory;
- Enter the “Recovery Console”, turn to the partition where pagefile.sys of virtual memory locates, execute “del pagefile.sys” command to delete the file, and execute “chkdsk /r”.
- Reset the virtual memory to a larger partition other than C driver;
- If the blue screen takes over when you are surfing on the Internet and uploading/downloading a lot of data (e.g. online games or download software), it should be the problem of network card driver. You need to update it.
Get A Reliable Tool to Easily Fix System Errors
If you are a general computer user thinking that the above-mentioned manners are way too complicated, you may try A Third-party Tool to help you out. It is convenient to have an effective assistant to rapidly and thoroughly fix errors on your PC, optimize it by repairing invalid Registry entries, avoid future system problems, and of course, get rid of the tcpip.sys error.