1. Turn off the secure boot function in the BIOS. If there is a secure boot, unsigned boot is not available.

2. Boot, find SecureBoot in the boot, switch WindowsUEFI mode to OtherOS, and then delete all SecureKey. 2) windows 10 in classic mode will not have this problem. Even if the above temporary solution is not implemented, there will be no prompt for digital signature.

3. The computer shows invalidsignaturedetected. Checksecurebootpolicyinsetup: indicates that the computer shows that an invalid signature has been detected. Check the security boot policy in the installer. There may be something wrong with the computer system, so this system needs to be reinstalled.

4. InvalidSignatureRetestedChecksSecureBootPolicyinsertup → Invalid signature detected. Check the security boot policy settings. This is the prompt that the driver is unsigned.

How to choose an electronic signature system?

Digitize the whole process to improve office efficiency. Through the third-party electronic seal system, enterprises can complete a series of operations such as application, production, authorization, approval, stamping and management of electronic seals anytime and anywhere through computers, mobile phones, tablet computers and other terminals, so as to realize digital management of the whole process and improve the efficiency of enterprise seal use.

Where is the wps electronic signature option? Hello, it's my pleasure to answer this question for you. First, please find the "WPS20 19" software in your computer, click to enter the main interface, and then open the document that needs to be added with electronic seal.

The third-party electronic signature system can bring security for enterprises to use electronic signatures.

The electronic contract system has powerful online editing function, and users can freely edit all kinds of documents, electronic contracts, cooperation agreements, announcements and notices online.

Here I can tell you how to choose a "reliable electronic signature system": a reliable electronic signature software needs advanced technology, qualifications and applications to ensure the security and compliance of electronic signature software, and it is easy to use.

Oh, it's May. I just saw it today As a suggestion, signature is only a simple function, but if you want to contact other applications, you need to have relevant interfaces. Pay special attention to this when chatting with developers.

How to get invalid signature when HP laptop starts USB flash drive system?

Turn off the safe boot function in the BIOS. If there is a secure boot, unsigned boot is not available.

Prompt that the digital signature does not match, check the security startup settings, which indicates that there is something wrong with the genuine system. Enter the BIOS, turn off UEFI startup and secure startup, confirm that the hard disk partition table is MBR, and then reinstall the system.

Use a USB flash drive to do pE on other computers, but Baidu Master U can download and install it. The USB flash drive is plugged into this computer, and the boot setting is that the USB flash drive enters the second pE. Close the pop-up interface, open the system repair, and repair the C disk. Restart the computer and unplug the USB flash drive.

The solution steps are as follows: find a good monitor and connect it to the computer. Boot test, if there is no pink vertical bar on the external monitor, the problem lies in the notebook screen. It may be that the screen is broken or the screen line is in poor contact, which belongs to a hardware problem and cannot be solved by itself. It is recommended to find a professional to repair it.

Detection method: Press F2 key to enter the detection interface after booting, and then select HardDriveTest (or HDDSelf-Test) to detect the hard disk. The whole process takes about 30 to 60 minutes. Remind you to connect the battery and the power adapter for power supply at the same time during the test.

Enter the safe mode, open the anti-virus software on the desktop, and completely kill the virus.

... shows that an invalid signature was detected. Check the security boot policy in the settings.

1. There is an invalid signature in the security startup policy. When starting the machine, press F8 to enter the safe mode, and then recover to a problem-free time period through the system recovery in the safe mode.

2. The computer shows invalidsignaturedetected. Checksecurebootpolicyinsetup: indicates that the computer shows that an invalid signature has been detected. Check the security boot policy in the installer. There may be something wrong with the computer system, so this system needs to be reinstalled.

3. InvalidSignatureturetedChecksSecureBootPolicyinsertup → Invalid signature detected. Check the security boot policy settings. This is the prompt that the driver is unsigned.

4. This is the BIOS setting of the motherboard. You can press F 10 to save and exit.

5. If win8 machine is pre-installed and win7 system is modified, it is suggested that you change the BIOS security option settings: press F2 to enter the BIOS, set Boot-LunchCSM-Enable, security-securebootControl- Disable, and then press F 10 to save and exit.

6. Use a USB flash drive to do pE on other computers, but Baidu Master U can download and install it. The USB flash drive is plugged into this computer, and the boot setting is that the USB flash drive enters the second pE. Close the pop-up interface, open the system repair, and repair the C disk. Restart the computer and unplug the USB flash drive.

... after reinstalling the system, a security boot violation occurred and an invalid signature was detected. What if this error still occurs? ...

There is an invalid signature in the secure boot policy. Just press F8 to enter the safe mode when starting the machine, and then restore to the time period without problems through system restore in the safe mode.

According to your description, this is because the partition boot system does not boot normally; Sorry, I'm not sure about the specific model of your computer and which version of the system you are using.

Press F8 (press F4 for win 10 system). When advanced options appear, select the last correct configuration, use the arrow keys to select, and then press enter. If not, restart, there will be a menu choice: safe mode, enter to enter antivirus, scan, and then restart. If you can't solve it, or you can't get in. Reinstall the system.

If this is still the case, you can click f9 to reply to the default answer, and then click f 10 to answer. If it is still invalid, the system has crashed and the answer needs to be reinstalled. You should try the answer first.