the first mothoed:(but this mothoed just can run before u restart ur pc)
RESOLUTION
1. Create a temporary folder under %Systemroot%, and then name it
Temp.
2. Grant full permissions on the Temp folder to the aspnet user
account in .NET Framework 1.0 or to the NETWORK SERVICE user account in .NET
Framework 1.1.
3. Right-click My Computer, and then click Properties.
4.
On the Advanced tab, click Environment Variables.
5. Select the TEMP
variable under System variables, and then click Edit.
6. Type
%SystemRoot%\TEMP in the Variable Value box, and then click OK.
7. Repeat
steps 5 and 6 to edit the TMP variable. Click OK two times.
8. Click Start,
and then click Run.
9. To reset Internet Information Services (IIS), type
iisreset on the command prompt
1. Create a temporary folder under %Systemroot%, and then name it
Temp.
2. Grant full permissions on the Temp folder to the aspnet user
account in .NET Framework 1.0 or to the NETWORK SERVICE user account in .NET
Framework 1.1.
3. Right-click My Computer, and then click Properties.
4.
On the Advanced tab, click Environment Variables.
5. Select the TEMP
variable under System variables, and then click Edit.
6. Type
%SystemRoot%\TEMP in the Variable Value box, and then click OK.
7. Repeat
steps 5 and 6 to edit the TMP variable. Click OK two times.
8. Click Start,
and then click Run.
9. To reset Internet Information Services (IIS), type
iisreset on the command prompt
the best right way:
修改IIS Application Pool 的启动用户为系统用户 ---成功