Can i install windows7 o windows vista in a hp proliant ML150 G3 ????

Try to install with Smart Start CD you can download from link below:
Smart Start

In many cases the Net Framework from Microsoft needs upgrading. Go to Microsoft and get the 4th and final version unless you are using Windows 8.1 which has it builtin.

SmartStart CD not available for ML150 G3
http://h20565.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/swdHome/?sp4ts.oid=3279687&spf_p.tpst=swdMain&spf_p.prp_swdMain=wsrp-navigationalState%3DswEnvOID%253D1005%257CswLang%253D8%257Caction%253DlistDriver&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken#Software

check ram
try hitting f8 on boot see if you can get into safe mode?
if u can then try running chkdsk /f in dos mode
if that doesnt work run a scan in safe mode
if cant get into safemode at all,get a bootable erd commander 2007 and boot with cd,choose your windows installation if you see it and use restore option,if you dont see windows installation at all try backing up ure data if necessary using usb adaptor for hard drive n copy data to other pc nad re install windows

This particular device will require drivers for the Operating System to use. Also the hard disk drives will have to be installed an initialized outside the Operating System first before use. This is usually during startup after the system BIOS.

The exact steps can be found on the RAID card manufacturer's web site.

reboot, and check to see if BIOS 'sees' the hard drive...if bios lists the drive, right click on 'My Computer' and select manage drives. the interface there is pretty straight forward... if bios does NOT see your drive, check your pin settings, be sure your connections are tight ...and check the BIOS settings match your drive

ML150 G3 is on the certified HW list for Ubuntu Server edition. There should be no special steps required to install this.

Clear System Event Log thru CMOS setup or the management software provided with server . The SEL is full that is the reason the error message

Hi ,
1) This server is a G3 , latest is G5 . It is outdated unsupported equipment.
2) Your continuous beeps on boot up with no video seems to indicate VGA card problem . Just put in another cheap VGA card and retest.
Good luck on solving your problems , hope I have helped you.