Hi,
Msvcr71.dll is a Microsoft C Runtime Library and a module which contains standard C library functions such as memcpy, printf and cos. It is mainly required for the essential running of the Microsoft libraries and checking
computers health status.
Run System File Checker tool, this will fix the corrupted Windows files, Running System File Checker tool might fix the issue
How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7
http://support.microsoft.com/kb/929833
If the issue still persists, you can try the following methods
Run the command and check the issue status.
a) In the start menu type CMD and press enter.
b) Right-click on the command prompt and select “RUN AS ADMINISTRATOR”
c) Run the following commands.
sfc /scanfile=c:\windows\system32\Msvcr71.dll
If you feel that, this is might be because of Firewall, turn off the firewall and check the issue status.
Turn Windows Firewall on or off.
http://windows.microsoft.com/en-us/windows/turn-windows-firewall-on-off#turn-windows-firewall-on-off=windows-7
Note: You should not turn off Windows Firewall unless you have another firewall enabled. Turning off Windows Firewall might make your computer (and your network, if you have one) more vulnerable to damage from worms
or hackers.
Note: In addition to a firewall, you also need an antivirus and anti-malware program to help protect your computer. Install Microsoft Security Essentials or another antivirus and anti-malware program, and keep it
up to date. Many of these programs update automatically.
You can also refer to:
msvcr71.dll missing.
http://answers.microsoft.com/en-us/windows/forum/windows_other-gaming/msvcr71dll-missing/2b2ff4ca-4866-45cf-b9d0-4f84c470c9af
MSVCR71.dll is missing.
http://answers.microsoft.com/en-us/windows/forum/windows_other-gaming/msvcr71dll-is-missing/e453d53d-c73e-4f03-b50e-b3f1a870e712
Hope this information helps you. Please do let us know if you need further assistance with Windows, we’ll be glad to assist you.