Window Home Server is built on Windows Server 2003 and thus doesn’t have any power savings turned on by default. While there are some add-ins to put WHS to sleep/hibernate, you should go into the Power Options and turn on the “Server Balanced Processor and Performance” scheme to at least minimize CPU power consumption.

1. Make a Remote Desktop connection to your WHS machine.
2. Click the Start button.
3. Click Control Panel, and then click Power Options.
4. On the Power Schemes tab, select Server Balanced Processor Power and Performance.
5. Consider changing the settings for Turn off hard disks, too.
6. Click OK.

While I don't recommend it, you can do the following to install Flash Player on Windows Home Server:

1. Open Internet Explorer.
2. Click Tools, and then click Internet Options.
3. Select the Security page.
4. Click on Trusted sites.
5. Click Sites.
6. Add http://*.adobe.com and http://*.macromedia.com as trusted sites, and then click Close.
7. Click OK to close the Internet Options window .
8. Open http://www.adobe.com/flashplayer and let it install.