Gamingnewslink.com’s self-help guide for fixing Left 4 Dead 2 crashes, freezes and steam/install errors
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One last note before proceeding to the list of Left 4 Dead 2. If you encounter errors or issues with Left 4 Dead 2 that are not included in the list below, issues which the solutions listed does not resolve, Tell us about it by Posting it in the comment box at the bottom of this page (No registration required). Include details about the Left4Dead 2 error and the specifications of the system you are running L4D2 on. It doesn’t have to be a fullblown dxdiag log, just the Video Card, Processor and amout of RAM and of course the Operating System (and service pack versions) you are playing Left 4 Dead 2 on. REMEMBER to check the comments at the bottom of this post.
List of Known Left 4 Dead 2 errors and solutions/workarounds
Problem #1 : Left4Dead 2 error message “Incomplete Installation (35)”
Fix : make sure your firewall allows outbound TCP connections to port 27019 and 27031.
credits: Richkaethler
Problem #2 : L4D 2 slowdown/lagging everytime the map is changed
Fix : Tab-out and get back in the game again
credits: Heino Kaveri
Problem #3 : Left 4 Dead 2 freezing/stuttering/lagging every x seconds
Fix #1 : Turn off mutli-core rendering
Fix #2 : Turn off Vsync
credits: Dunastrig
Problem #4 : L4D2 Pink/dark texture problem
Fix : no known fix as of this posting
Problem #5 : Left4Dead 2 headless models problem
Fix : Update your graphics card to the latest version
Problem #6 : L4D2 error “Unable to load library client”
Fix : no known fix as of this posting
Problem #7 : Left 4 Dead 2 always crashes on Windows Vista 64bit
Fix : START > MY COMPUTER > WINDOWS > RIGHT CLICK ‘CSC’ > PROPERTIES > SECURITY
Make the ADMINISTRATOR own the folder
credits: Havok
Problem #8 : L4D2 always crashing randomly
Fix :
1. Close Steam
2. Go to ..\steam\steamapps\
3. Delete left 4 dead 2 common.ncf, left 4 dead 2 client.ncf
4. Restart Steam
5. Right Click L4D2 click Install
credits: Freyar
Problem #9 : L4D2 can’t run after install: Verify steam service is running
Fix :
credits: JoeR
Problem #10 : Left4Dead 2 problematic lag(freezing intermitently), slowdown and eventually crashing
Fix 1 : Disable multicore rendering
Fix 2 : mat_queue_mode 0 (console command)
Fix 3 : Update Nvidia Drivers to Beta 195.39
credits: oct42, redninja, mic
Problem #11 : Left 4 Dead 2 CTD (crash to desktop) fix
Fix :
1)Navigate to your windows folder (usually c:/windows/)
2)Inside there, goto the CSC folder
3)Try to open the folder and it should fail (if it doesn’t, you have a different problem). It’ll come up with ‘You don’t currently have permission to access this folder’ at which time you keep pressing continue until it says you’ve been denied.
4)Right-click the folder, go to properties.
5)Go to the security tab at which point it’ll say ‘To continue, you must be an administrative user with permission to view this object’s security properties’ at which point you click continue.
6)Click on admin in the owner tab which will swap the owner to the administrator then click OK.
7)You then click on OK once again which will bring up the security tab.
8)Tick ‘full control’, press OK twice to get out of the properties tabs.
9)Run the game.
credits: fuloran
Problem #12 : Post Your Left 4 Dead 2 error at the comment box below if you are experiencing errors that are not listed here
Solution : Help out and post solutions to L4D2 errors at the comment box below if you know one 
credits: YOU!
Important!: If you are experiencing errors with Left 4 Dead 2 that are not listed above or is not solved by the specified fixes, Tell us about it by posting in the comment box below (include system specs, OS, and description of the error you encounter in Left 4 Dead 2), NO REGISTRATION REQUIRED TO POST/ASK QUESTIONS/POST SOLUTIONS
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