Question:
Recently, my laptop has lower performance than before, I run windows task manager to monitor the CPU usage, I found that WPFFontCache_v0400.exe is taking too much CPU usage, almost 100% CPU, my applications almost stop responding. Is there any problem to end the WPFFontCache_v0400.exe from the windows tasked manager?
What is WPFFontCache_v0400.exe? How to fix WPFFontCache_v0400.exe problem?
Is WPFFontCache_v0400.exe a computer virus or Trojan? How to remove WPFFontCache_v0400.exe virus?
Answer:
WPFFontCache_v0400.exe is related to “Windows Presentation Foundation (WPF) Font Cache " service, WPF applications share font data by the WPF Font Cache service. If the service is not already running, your first WPF application will starts this service and WPFFontCache_v0400.exe will run automatically at the same time. If your font cache is corrupted, WPFFontCache_v0400.exe would consume high CPU usages. To fix this problem, please follow these steps:
1, Stop the WPF Font Cache 4.0 service manually.
2, Delete all of the WPFFontCache_v0400* files. If your windows is Windows XP, you could find these files in your C:\Documents and Settings\LocalService\Local Settings\Application Data\ folder.
3, run wise pc doctor( Download Link ) to fix other WPFFontCache_v0400.exe related errors.
4, Start the service again.
If the above steps don’t work, we think your laptop was get infected by Virus:Win32/Ramnit, this virus could hide themselves as WPFFontCache_v0400.exe.
How to get rid of WPFFontCache_v0400.exe virus (spyware,Trojan，worms) automatically?
You will need to download and burn into CDROM several programs on clean PC or copy them to USB Disk to remove virus. Here is the instruction:
Step A: copy the below programs to USB disk (you can use an MP3 player) or Burn them to CD:
- Avast Pro Antispyware software(free of charge) .Please download with this Download Link.
2.Wise PC Doctor:with this download link to restore damaged registry values.
You might want to download BitDefender Anti-Virus as alternate scanners.
Step B: Restart your computer. At this point you need to gently Press the F8 key repeatedly when you find the startup menu, Select the option “ Safe Mode with Networking” by using the arrow key, then press Enter key on your keyboard , and your computer will start into Windows Safe Mode.
Step C: Now you need to install Avast Pro Antispyware on your computer, When the program is installed， your need update its database to the latest, then reboot your computer to make the program fully functional, Go Step B to reboot your computer into Safe Mode and do a complete scan for your computer .
NOTE:
(1)In case you have some problems running Avast Pro Antispyware, you may rename the downloaded file name to explorer.exe or iexplore.exe. After that double click the download file and follow the install steps.
(2) Please make file extension show before renaming download file.
Step D: After finish the full scan, click "Show Results" and be sure that the important data aren’t removed and infected. Select or ignore the scan result and click "Remove Selected" button to get rid of the virus and malwares. Avast Pro Antispyware will give you a report to indicate all operations for this scan. It can be saved as you want. Restart your computer and the Avast Pro Antispyware will get rid of all virus or malwares which are detected before.
Step E: How to erase bad registry? Please install Wise PC Doctor– the best PC cleaner can easily fix your broken registry values and restore registry values.
Why Wise PC Doctor should be used?
As we all know, virus, Trojans and Malwares make the computer breakdown by destroying and modifying the registry values so that the computer will not run normally.
After the virus, Trojans and Malwares are removed, the registry remains to be destroyed or modified, therefore the computer’s system still has some problems. That’s why you really need to fix the registry. Furthermore, some virus, Malwares and Trojans leave many dll data in the registry and this may cause damaged DLL errors and also have an effect on the computer’s system performance.
In any other case Uninstall or install software may make your registry database fragmented, with corrupted, harmful and obsolete files. Do a complete scan for your computer by Wise PC Doctor at this moment.
Step F: Run Wise PC Doctor to repair your computer:
1. Install Wise PC Doctor.
2. Click "One-Click Fix", do a complete scan for your computer.
3. Click “Repair All” then fix all detected problems.
Following the easy steps above, your computer will run much faster than before.