Solution Lenovo Erazery50-70 Installation Win7, boot to the system logo at the cotton Problem method

As shown in the following figure

When we boot up to the Windows 7 logo interface, it's not going to be able to get into the system or a long time.

Reason Analysis:

This situation is generally caused by three factors.

1, failed to correctly convert the hard drive format or partition failed 4KB alignment caused.
2, installed the incorrect driver.
3, the machine itself caused by factors.

Solution:

First, for the failure to correctly convert the hard drive format or partition failed 4KB alignment, we recommend that you use the OEM version Win7 installation CD to install the system, press "SHIFT+F10" when Setup runs to create the disk partition interface to start the command window. You can enter the DiskPart command environment after entering DiskPart carriage return.

You can convert your hard disk to MBR format by executing the following command in the DiskPart command environment. ( This operation clears the hard drive data, please back up the data in advance.) )
Lis Disk//List all disks in this machine

Sel Disk 0//select No. 0 (select according to requirements)

Clean//Except for all partitions on the selected disk

Convert MBR//-the disk from GPT to MBR

create partition primary size = 50000//Creating a 50G Primary partition

Format Fs=ntfs Quick//fast formatted as NTFS

Active//Activate the partition
Exit//Exit

At this point, click on the System Installer interface Refresh button, refresh the hard drive information select the partition just created, to install the system can be.

Second, to install the incorrect driver solution

1, the boot press F8 into the safe mode;

2, in the operation of the input---MSCONFIG---the general---Select diagnostics to start, reboot, after the system to see what drives in the Device Manager is not with Microsoft digital signature, if there is to Lenovo official website download with WHQL certified driver, in the uninstall original driver based on the update driver.

3, as the installation of the driver after the situation, can be powered on F8 Select the last correct configuration mode, uninstall just installed the driver, the installation of Lenovo's official website can be.

If the above method still doesn't solve your problem, we can try to fix the problem by manually reinstalling the Windows7 system or by installing the Windows 8 system.