a problem with the window boot manager

Battery check same as here for DV3 with Win7:

HP Battery Check Frequently Asked Questions for Notebooks Running Windows XP HP Pavilion Notebook PCs - HP Customer Care (United States - English)

Resetting the BIOS to optimal defaults will not affect anything other than changes you have previously made, or may not know you made. Read the instructions carefully in this tutorial: Clear CMOS - 3 Ways to Clear the CMOS - Reset BIOS

You can also enter BIOS setup and look under Power settings for Battery settings. They may have changed from optimal which is why I suggest resetting BIOS to optimal defaults.

Thank for replay
Well I did reset it However it turned out to be that there was no change in the BIOS
The problem is in the power system of my computer according to a computer technician I guess the fact that the BIOS was reset to the optimal defaults the automatically included the power settings right......... the problem is that the laptop is a new one i do not know what to do if I take it to a computer technician he will dissociate it and also it may cost a lot of money ....anyway thank you very much and I am sorry if I was careless with your devices