Windows 7 Ubuntu Dual System Installation Adventures

installation process various issues. Because the computer was previously someone else's, the partition was particularly messy, and the hard disk was made into a dynamic disk (can be arbitrarily partitioned, but does not support dual systems. When more than 3 primary partitions are allocated under the window, the prompt will be converted into Dynamic disk, it is best not to make sure that the unnecessary partitions are converted to logical partitions by diskgenius, otherwise it is impossible to install dual systems.). Under diskgenius, except for the primary partition, everything else became a free partition. Then use the missing partition search function, accidentally, the C drive is overwritten. The boot cannot be restarted. Fortunately, I was fully prepared to insert the system disk. After the repair, the partition magically changed back to the non-dynamic disk, but lost a partition. However, I have already done a backup before the hard disk operation. After restoring the data, follow the method on the link to successfully install it.