Step 14 in a series of posts documenting the Microsoft SharePoint Foundation 2010 upgrade process on SBS 2008. This is based on the document:
Step 14 - Install Windows Small Business Server 2008 Update Rollup 4
In a browser visit http://go.microsoft.com/fwlink/?LinkId=199703
In the search box enter 979454 and press Search.
For the item Update Rollup 4 for Windows Small Business Server 2008 (KB979454) select Add.
Click View basket.
Browse to a folder where you want to save the file and click Continue.
Open the location where you saved the download and open the folder called Update Rollup 4 for Windows Small Business Server 2008 (KB979454).
Double click the CAB file located there. Double click the MSP file this displays and enter a location on your disk to extract the file.
Right mouse click on this extracted file and select Apply from the menu that appears.
Note that after the process is complete you may need to complete a manual crawl of your data to update the search indexes.