The setup failed to read IIsMimeMap table. The error code is -2147023550.

I've been facing issues with installation of Reporting service 2005 and making it run but for the first time I faced an issue while uninstalling it. On trying to uninstall I got the following error
"The setup failed to read IIsMimeMap table. The error code is -2147023550"
Solution:
1. Stop IIS Admin service
2. Stop IIS
3. Uninstall Reporting service.
Result:
Successfully uninstalled Reporting service 2005

ASP .Net Service account appears blank

Its been time I got a chance to trouble shoot a Reporting Service Problem, and this time it was on Windows 7. Actually I faced this issue once before and I managed to skip trouble shooting that.
Reading the initial "Program incompatible message" on running the setup of SQL 2005 I came to know that its necessary to install SP3 for SQL 2005 to run on Windows 7. I downloaded it and installed successfully.
On opening (my favorite) Reporting service Configuration tool, I observed that the "ASP .Net Service Account" appeared blank and because of that I was not able to change the Application pool to ReportServer (which is created by default)
Reading few blogs I changed the Application Pool to Reportserver (from DefaultAppPool) using IIS-> Advanced Settings
But still the problem of the ASP .Net service account was lingering.
I ran the following command to get the service account appear in the configuration tool.
aspnet_regiis -ga "NT Authority\NetworkService"

Change in PC name, stops Reporting Service 2005

I deployed few reports on my Test Machine with TestMachine. As we wanted to implement a format of PC names, we happened to change the name of the Machine to e.g CompanyTestMachine
Before the rename happened, our system as well as the reports were working properly. Once the name was changed, we started getting error Report Server database not found.
Then I thought to redo the settings of Reporting service so as to change the required settings. On following the steps, I came across a error
User CompanyTestMachine\ASPNet not found
I then tried repairing the Microsoft Framework which didnt help. I ran the aspnet_regiis.exe /i command which also didn't help. I read many blogs but couldn't find a way out so I ended up renaming the machine to its original name.
I am still searching for a solution to this problem, if someone reading this has one I would appreciate if you could share it with me.

Error (rsAccessDenied) - 'NT AUTHORITY\NETWORK SERVICE' are insufficient

I did all the necessary settings to the reporting service so that my domain users can access the reporting service, but still I was getting rsAccessDenied error.

Then I read once solution in one of the forums in which there were few steps mentioned which solved my problem
1. Open http://localhost/reports
2. Go to Home Properties
3. Add a BUILTIN\Users and gave it Browser permissions and the problem was solved.

Struggling with LoadTest Reports

Been two days I was struggling with troubleshooting Loadtest reports. Still I am not able to access the inbuilt LoadTest report which comes with VSTS 2008.

Thanks to Shai, for giving me this wonderful link which solved my purpose of reports.