Install and run the pre-upgrade scan tool
You can use the pre-upgrade scan tool to scan all Web sites in your environment (by using the /all parameter) or to scan a specific URL (by using the /vURL parameter). If you do not supply a scoping parameter, all Web sites will be scanned.
Note:
If you have already installed the new version but have not yet run the SharePoint Products and Technologies Configuration wizard, you can run the pre-upgrade scan tool from the following folder: %PROGRAMFILES% \Common Files\Microsoft Shared\web server extensions\12\BIN.
2. After the scan has completed, a summary report is displayed in the command-line window. If there were any errors or if any upgrade issues were found for your sites, you can review the full report to see the details. The report is named PreupgradeReport_uniqueID_Log.txt (where uniqueID is a number string) and it is located in the temp directory on the computer of the user who ran the tool (for example, %SYSTEMDRIVE%:\Documents and Settings\User1\Local Settings\Temp). There is also a prescan.log file in the same directory; this prescan.log file notes the time or times when the pre-upgrade scan tool was run.
For example, a designer or developer might decide that it would be prudent to rebuild a heavily obfuscated Web Part before the upgrade occurs. Site owners can then verify any customizations that have been done to their sites, including site templates and changes to core Active Server Pages Extension (ASPX) files, and can note any potential issues.



